贡山乌头 gong shan wu tou

Caudex obconical, ca. 3 cm, 6--10 mm in diam. Stem 74--80 cm, 1- or 2-branched below inflorescence, appressed pubescent, with 8 leaves equally arranged along stem. Proximal cauline leaves withered at anthesis, middle ones slightly long petiolate; petiole 3--7 cm; leaf blade pentagonal, ca. 8 × 9 cm, both surfaces shortly yellowish strigose, 3-parted; central lobe rhombic, apex acuminate; lateral lobes obliquely flabellate, unequally 2-fid. Inflorescence 5--18 cm, 7--20-flowered; rachis and pedicels densely spreading yellow pubescent; proximal bracts leaflike, distal ones linear. Pedicels 0.8--2.2 cm, with 2 bracteoles at middle; bracteoles subulate, 2--3 mm. Sepals blue-purple; lower sepals ca. 0.8 cm; lateral sepals ca. 0.9 cm; upper sepal navicular or falcate-navicular, oblique upward, shortly beaked, ca. 1.2 cm from base to beak, both surfaces yellow pubescent, lower margin slightly concave. Petals ca. 9 mm, glabrous; limb ca. 7 mm; lip ca. 5 mm; spur incurved, ca. 1.2 mm. Stamens glabrous; filaments entire. Carpels 5, densely yellow pubescent. Fl. Aug.

* Grassy slopes; 3500--4100 m. Yunnan.